Entrainment of MHD modes in ASDEX Upgrade using rotating non-axisymmetric perturbation fields

摘要

In recent ASDEX Upgrade experiments the entrainment of a fast rotating (around 2-5 kHz) m=2, n=1 tearing mode to a slowly rotating perturbation field (5-10Hz range) applied by in-vessel coils have been investigated. The ultimate goal of these experiments is active disruption avoidance by externally applied magnetic perturbations. In this work we start investigating the physics basis of this approach and our initial results can be considered encouraging.